Data from "Atlantic for the New Haven", Railway and Locomotive Engineering, Volume , No 1 (January 1908), p. 29. (Many thanks to Chris Hohl for his extensive research and his 3 December 2018 email, spreadsheet, and article link.) Works numbers were 41714-41725 in October 1907.
Delivered as saturated-boiler locomotives in 1907, these Atlantics were ready-made for early conversion to superheating. Although fitted with slide valves, the 1100s had good proportions in the the boiler and grate, outside radial valve gear, and tall drivers. Firebox heating surface area included 27.5 sq ft (2.55 sq m).of arch tubes.
By 1912, the New Haven had started retrofitting the class with superheaters. See Locobase 8115.
Data from NH 1962 Steam Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also "Atlantic for the New Haven", Railway and Locomotive Engineering, Volume , No 1 (January 1908), p. 29.
Delivered as saturated-boiler locomotives in 1907, these Atlantics soon underwent an overhaul in 1912-1922 that added a superheater to the essential 4-4-2. Comparing the F-1 to the A-3 illustrates the signficant gains made by adopting that trailing axle. The grate area almost doubled and heating surface area jumped, which allowed fast running for longer stretches or with heavier trains.
Yet on the New Haven, as on almost all Atlantic operators, the appeal of a still larger boiler and more adhesion led to the class's eclipse in favor of the 4-6-2. New Haven's calculation of boiler underscored the difference. Total evaporation capability came to 35,495 lb/hour of which 11,715 lb/hour was generated by the direct heating surfaces; the latter included 28 sq ft in 4 arch tubes.. Maximum steam consumption reached 34,420 lb/hour, which yielded a boiler factor of 102%.
The F-1 was redesignated H-1 in 1928 to avoid confusion with an inherited CNE 2-8-0 class (Locobase objects: why didn't the foreign-road locomotives recede?) Drury (1993) notes that a couple were kept on the ready after 1935 to substitute for the diesel-powered Comet that ran between Boston and Providence. The last of the class was retired in 1947.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | F-1 | F-1/H-1 |
| Locobase ID | 16385 | 8115 |
| Railroad | New York, New Haven & Hartford (NYNH&H) | New York, New Haven & Hartford (NYNH&H) |
| Country | USA | USA |
| Whyte | 4-4-2 | 4-4-2 |
| Number in Class | 12 | 12 |
| Road Numbers | 1100-1111 | 1100-1111 |
| Gauge | Std | Std |
| Number Built | 12 | |
| Builder | Alco-Schenectady | New Haven |
| Year | 1912 | 1912 |
| Valve Gear | Walschaert | Walschaert |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7.25 / 2.21 | 7.25 / 2.21 |
| Engine Wheelbase (ft / m) | 28.17 / 8.59 | 28.17 / 8.59 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.26 | 0.26 |
| Overall Wheelbase (engine & tender) (ft / m) | 56.08 / 17.09 | 56.08 / 17.09 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 53,570 / 24,299 | |
| Weight on Drivers (lbs / kg) | 105,500 / 47,854 | 106,720 / 48,407 |
| Engine Weight (lbs / kg) | 200,000 / 90,719 | 206,200 / 93,531 |
| Tender Loaded Weight (lbs / kg) | 134,000 / 60,781 | 130,000 / 58,967 |
| Total Engine and Tender Weight (lbs / kg) | 334,000 / 151,500 | 336,200 / 152,498 |
| Tender Water Capacity (gals / ML) | 6000 / 22.73 | 6000 / 22.73 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 14 / 13 | 14 / 13 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 88 / 44 | 89 / 44.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 79 / 2007 | 79 / 2007 |
| Boiler Pressure (psi / kPa) | 200 / 1380 | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 26" / 533x660 | 22" x 26" / 559x660 |
| Tractive Effort (lbs / kg) | 24,674 / 11191.95 | 25,726 / 11669.13 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 | 4.15 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 347 - 2" / 51 | 205 - 2" / 51 |
| Flues (number - dia) (in / mm) | - 5.5" / 140 | 28 - 5.5" / 140 |
| Flue/Tube length (ft / m) | 16.83 / 5.13 | 16.83 / 5.13 |
| Firebox Area (sq ft / m2) | 213.20 / 19.81 | 213 / 19.80 |
| Grate Area (sq ft / m2) | 53.50 / 4.97 | 53.50 / 4.97 |
| Evaporative Heating Surface (sq ft / m2) | 3255 / 302.40 | 2686 / 249.63 |
| Superheating Surface (sq ft / m2) | 538 / 50 | |
| Combined Heating Surface (sq ft / m2) | 3255 / 302.40 | 3224 / 299.63 |
| Evaporative Heating Surface/Cylinder Volume | 312.38 | 234.79 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 10,700 | 10,165 |
| Same as above plus superheater percentage | 10,700 | 11,893 |
| Same as above but substitute firebox area for grate area | 42,640 | 47,350 |
| Power L1 | 10,920 | 18,791 |
| Power MT | 456.39 | 776.37 |